PendingLockPromise (Red Hat Data Grid 7.3.9 API)

```
public interface PendingLockPromise
```
A promise returned by PendingLockManager.
When a transaction need to wait for older topology transaction, this class allows it to check the state. If the transaction does not need to wait, or all older transactions have finished or have timed out, the isReady() method returns true. Also, it allows the caller to add listeners to be notified when it is ready.

Since:

8.0

Author:

Pedro Ruivo

Field Summary

Fields
Modifier and Type Field Description

static PendingLockPromise NO_OP

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addListener(PendingLockListener listener)`	Adds a listener to this promise.
`long`	`getRemainingTimeout()`
`boolean`	`hasTimedOut()`
`boolean`	`isReady()`

- Field Detail
  - NO_OP
```
static final PendingLockPromise NO_OP
```
- Method Detail
  - isReady
```
boolean isReady()
```
    Returns:
    
    true when the transaction has finished the waiting.
  - addListener
```
void addListener(PendingLockListener listener)
```
    Adds a listener to this promise.
    The listener must be non-null and it is invoked only once. If isReady() returns true, the listener is immediately invoked in the invoker thread.
    
    Parameters:
    
    listener - the PendingLockListener to add.
  - hasTimedOut
```
boolean hasTimedOut()
```
    Returns:
    
    true if the time out happened while waiting for older transactions.
  - getRemainingTimeout
```
long getRemainingTimeout()
```
    Returns:
    
    the remaining timeout. It is zero when hasTimedOut() is true.